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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1467 | $media_states[] = __( 'Header Image' ); |
| 1468 | } |
| 1469 | |
| 1470 | if ( current_theme_supports( 'custom-background') ) { |
| 1471 | $meta_background = get_post_meta($post->ID, '_wp_attachment_is_custom_background', true ); |
| 1472 | if ( ! empty( $meta_background ) && $meta_background == $stylesheet ) |
| 1473 | $media_states[] = __( 'Background Image' ); |
| 1474 | } |
| 1475 | |
| 1476 | $media_states = apply_filters( 'display_media_states', $media_states ); |
| 1477 | |
| 1478 | if ( ! empty( $media_states ) ) { |
| 1479 | $state_count = count( $media_states ); |
| 1480 | $i = 0; |
| 1481 | echo ' - '; |
| 1482 | foreach ( $media_states as $state ) { |
| 1483 | ++$i; |
| 1484 | ( $i == $state_count ) ? $sep = '' : $sep = ', '; |
| 1485 | echo "<span class='post-state'>$state$sep</span>"; |